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所提出的高 Ｔｃ 超导薄膜内禀热稳定性准则既不同于经典的超导磁体低温热稳定性准则，也不同于其它的忽略导热波动效应的超导薄膜内禀热稳定性准则。高 Ｔｃ 超导薄膜内产生的热扰动在向外传输到冷却介质的过程中，即使受热传导波动效应的影响， 超导薄膜也能传输正常工作电流而不至于发生失超现象， 这种新的热稳定性准则更符合高 Ｔｃ 超导薄膜的实际工作情况。本文主要分析高 Ｔｃ 超导薄膜在受到热扰动后， 依然保持热稳定时所能传输的最大电流密度、热传导的波动效应和热导率的各向异性对超导薄膜的内禀热稳定的影响。高 Ｔｃ 超导薄膜的内禀热稳定性受热扰动的强度、松驰时间、 Ｂｉｏｔ数、纵横比、平行薄膜和垂直薄膜方向的热导系数比值的影响。
The proposed criterion for intrinsic thermal stability of high Tc superconducting thin films is different from that of classical superconducting magnets and also different from other thermal stability criteria of superconducting thin films that neglect thermal fluctuation effects. The thermal disturbance generated in the high Tc superconducting thin film can transfer the normal operating current without quench even in the process of outward transmission to the cooling medium even under the influence of the heat conduction fluctuation. This new Thermal stability criterion is more in line with the actual work of high Tc superconducting thin film. This paper mainly analyzes the influence of the maximum current density, the fluctuation of heat conduction and the anisotropy of thermal conductivity on the intrinsic thermal stability of the superconducting thin films after thermal disturbance of the high Tc superconducting thin films. . The intrinsic thermal stability of high Tc superconducting films is affected by the intensity of thermal perturbation, relaxation time, Biot number, aspect ratio, ratio of thermal conductivities between parallel and perpendicular films.